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,y <br /> dF <br /> IIYDROGEOLOGIC INVESTIGATION <br /> EXXON COMPANY,US.A, <br /> RETAIL STORE 7-3708 <br /> i 2705 COUNTRY CLUB BOULEVARD <br /> STOCKTON,CALIFORNIA <br /> F DELTA PROJECT NO.40-91-933 <br /> i <br /> 1.0 INTRODTJI:"E'I, ON <br /> T' Delta Environmental Consultants. Inc. (Delta),was authorized by Exxon Company, U.S.A. (Exxon), to <br /> evaluate the presence or absence of petroleum hydrocarbons in the soil and ground water beneath a retail <br /> ,. gasoline station located at 2705 Country Club Boulevard,Stockton,San Joaquin Ccunry,California. The <br /> site location is shown in Figure 1. <br /> E <br /> 1.1 <br /> Scope 4 Work <br /> Work performed at the sf.te included the following tasks: <br /> e Drilling three soil borings to 27 feet below grade and completing them as groan i water <br /> monitoring wells MW-I,h1W-2,and MW-3. <br /> 6 Collecting soil samples at approximately 5-foot intervps. <br /> . ,I a Screening the recovered soil same!-- in the field for the presence of organic vapors and <br /> submitting selected samples for laboratory analysis of petroleum hydrocarbon constituents. <br /> 1 <br /> a Developing, purging, and collecting ground watNtr samples from each monitoring well for <br /> r, Iaboratory analysis of petroleum hydrocarbon constituents. <br /> t <br /> a Surveying monitoring well riser elevations and measuring ground water levels in monitoring <br /> -- wells MW-I.MW-2,and MW-3. <br /> Monitoringwell installation,development,and sampling was performed on August 23.1991. Delta personnel <br /> returned to site to measure water levels in the monitoring wells on August 29, 1991. Field work was <br /> conducted in accordance with the methods and procedures presented in Appendix A <br /> I <br /> RP T00713F <br /> i <br /> - <br />